Premium
Sequence Relationships of Loess‐Derived Forested Planosols in Southeastern Iowa
Author(s) -
Cain Charles C.,
Riecken F. F.
Publication year - 1958
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1958.03615995002200050021x
Subject(s) - loess , sequence (biology) , horizon , geology , soil horizon , series (stratigraphy) , boundary (topology) , soil science , hydrology (agriculture) , geomorphology , physical geography , soil water , paleontology , biology , mathematics , geography , geotechnical engineering , genetics , geometry , mathematical analysis
According to genetic theory, the loess‐derived soil series of southeastern Iowa can be arranged in a number of sequences. As for a number of other sequences studied previously, there is increasing clay in the B t layer with decreasing loess thickness. The forested Planosols have an A 1 (A p )A 2 B g C 1 genetic horizon sequence. They have greater textural differences and a more abrupt boundary between the A and B horizons than any other sequence. In the forested Planosols, there is a secondary accumulation of N and organic P in the B horizon; the free Fe tends to accumulate in the A 2 B transition layer.